SE Bots Activity Log Drops

I noticed an abrupt change in my SE Bots Activity Level that coincides with a decline in Analytics SE traffic.

15 2010-03-30 5,706 363 2,857 - 434 2,052 3,184 171 92 2,259
16 2010-03-31 14,435 672 8,830 - 1,097 3,836 7,392 1,001 3,872 2,170
17 2010-04-01 90 8 59 - 4 19 38 15 5 32

Any ideas of things I should look for? Right around that time I tweaked vBSEO settings and Sitemap settings but did so much no clue what.

I have the following set YES:
Log Spider Activity in your Forums?

Hello Alan ,

Which settings did you tweaked within vBSEO ?

I have no idea every setting I tweaked around that time, just too many.

Without knowing detailed , it is impossible comment correctly on the issue but what i can suggest you is creating a Critique Thread within vBulletin SEO Discussion - Critique Please at vBSEO.com so other users and vBSEO Staff can supply tips to you.