I'm not familiar with New Mexico law, but in MN condo buyers have a 10 day right of rescission which allows you 10 days to review the condo documents and basically bail out if the HOA and/or documents look shaky. If New Mexico has such a law, this could potentially delay the 'final acceptance' date of your contract. You would need to talk to your agent on this issue.
Do the sellers give a reason why they are providing such a limited window?
None is more important and any other because each carries with it significant effects that could be adverse to you if things don't work right.
There is no such thing as normal contingencies. You might have those that many others do but treating them as "normal" reduces their importance.
If your contingencies are satisfied, why not remove them? If you think they can't be cleared, then simply require more time, you are the buyer. Never forget that it is YOUR money and everyone else wants it. If someone doesn't want to go along with your program, go elsewhere. Money once spent belongs to another. There are always more houses or condos. Always.
These days when it comes to selling sellers tend to be a bit aggressive. Michael answer was right one. If you are financing you may not want to remove all contingencies after 14 days. If you are paying cash and can inspect the unit itself and all the condo documents including the financials of the association and the reserves. The 14 day removal may not be a big deal. Talk with your agent and see what they think. They know your market and can help you make the best decision.
Best of luck,