Actions keep being cancelled

I'm getting the same problem. (not going to school or work) My sim when asked to weed the garden kneeled down started to weed and stand straight back up again and do this several times over and over without a weed being removed.
The Cow plant refuses to eat every time food is offered. Another is when you select toilet stop and then shower, my sim will stop the toilet task (even when not started or finish half way through and go to the shower. 
When asking family members to get left overs. One is able to carry out the task while the others wave their arms and the task is cancelled out. Sims are glitching along walls and walking in circles then end up walking through walls or jamming against them. 
I have Sims unable to open doors to enter or exit a room. It isn't until I go into build mode and move the door out from the wall and place it back that I am able to get my Sime to enter/exit the room. This happens frequently over time. 

General queries: 
1) Why dose the Sim (standing in a kitchen eating) then decide to travel across the length of the House to wash in a sink when they could use the dish washer or sink in the kitchen?
2) When you are trying to get your Sim to chat with another in order to gain social gains or trying to woo. Why dose the other sim (Non playing or otherwise) just rudely walk off? This is extremely annoying.
3) With Visiting Sims. (That you have as a Playing Sim in another household) why can't they be a controlled sim while visiting to get better interaction?
4) Bees do not fly at night. 
5) During heavy rain the canals and rivers do not change their rate of flow or height? 
6) Why dose Super Fertilizer cost a hundred Simoleans per bag yet only fertilize one plant. Could it least fertilize 5-10? 
7) Is it possible to have a Sim finish a Painting they start before starting another? I have Sims leaving several unfinished paintings at any given time.