French language Q&A Forum

When I have moved up a level, from what I understand Kwiziq will not test me on anything from previous levels unless I switch back to the level.  My general question is this: how often do people review and improve previous levels?  But more specifically:

I think I read on here somewhere that the suggested time to move up is when you achieve 75% in a level. Is it recommended to return often, e.g. every day or two, until getting it up to 100%, or less frequently?

Finally, when lower levels are at 100%, how often is it recommended to return to them? 

This is a bit subtle, and perhaps it is more advanced than an A1 level test.

I notice in the summary of the text that Président has been capitalised. "Le Président visite un musée"

I believe this is incorrect and that this should not be capitalised in French:

le président français. = the French president.

Le président de la République française = The President of the French Republic.

Although if you were speaking to the President of France in direct address , you would address them as: "Monsieur le Président/Madame la Présidente (de la Republique).

Both si and tellement are used for so.  Are thee interchangeable or is there a preferred context for use?