As far as the total achievements go, I think it is a true sum of all the instances of each achievement. However, next to each achievement, it only shows the most significant power of two in the binary representation. So, if you have 70 +5 posts, it will only show 2^6 next to that achievement, but will contribute the full 70 points to the total.

So submit a better one... I'm sure that these are driven by user submissions just like always.

It's likely that your reinstall on every boot is necessary because your distribution includes several open source replacement drivers which interfere with the one you installed. This can be fixed via adding

DISABLED_MODULES="nvidia nvidia_legacy nvidia_new"

to /etc/default/linux-restricted-modules-common , or something like it.

On the internets these days, ftw means For The Win.