Re: Game will save but doesn't update the actual save file.
Are you just saving over the previous save every time or are saving using the "Save As" option? In your 1st pic I see just one save listed in the panel, but it looks like you cropped it so, I'm guess you do have other saves.
I've had something similar to what you describe before, several times actually. Right portrait, wrong household name and the Resume option landed you on the wrong lot. When that happens, it means something happened causing an error when you made the last save and may have corrupted it or caused it to abort the save process without giving you a visible error message, so the game couldn't/wouldn't load it and reverted to a previous version of the save. Everything you did between the saves is simply gone as if you never made any changes before the last save. Whenever that happens, it is a good idea to make a new save using "Save As" as soon as possible after you realize something happened before you play or attempt to save again so you can at least save what you have up to that point. You can then play on and see if it keeps happening and have something to fall back on if you need it. I recommend that you do a game repair and delete the localthumbcache file before you start the game the next time you play. At the least, delete the cache file as the portrait you see when you select the save to load is kept there and that will probably correct the portrait you see attached to the save in the Load panel so that at least will match the Household name.
Sometimes it will seem to self-correct, and you won't have any issues with saving or playing after a game restart and reload meaning it was a one-time thing that didn't damage the save. But other times it won't, meaning that the save has corrupted which will only get worse if you continue playing the save. One thing you should look for the next time you open the save is for any signs of triangle icons with an exclamation point in them on the lots. If you get an icon, which can be several different colors, each indicating some sort of issue, when you mouse over or select the lot as if you were going to open it, you might have more than a save issue as the icons are one of the indicators of corruption in most cases, Orange and Red being the worst. My advice is that you look at every lot in every world in the save to see if you find one or more. If you do find one, try to open the lot. If the lot won't load, or if the does load and you find the lot empty with the sims who live there standing in front of it, that is an almost certain sign that you have a corrupt lot. The sims living on that lot will mostly likely have been corrupted too. Tbh, at that point, you should try to save what you can to your Library and start a new save because it will only get worse, and you will lose everything.
Not what you wanted to hear, I know, and I admit it is worst case scenario. But when you start to have save problems like you've described, the odds go up that it can happen. The reason I ask about how you save is simply this. If you routinely use Save As rather than just Save, you create a brand new save each time rather than overwrite the old one. As each save can have up to 5 versions that you can use to recover, using Save As gives you more saves you can use to recover giving you more options to find an earlier version before the event that caused the corruption occurred. Hopefully, you just had a one-time glitch, and everything will go back to normal but if it continues to happen, you should probably consider starting over in a new save with what you can salvage from the old one.
Hope this helps.