Just tried it again with 1mb set at the limit file size. Same deal, 2 of the images were 1mb, the others were around 1.8mb.
Source images are all around 8mb.
I want my deadline workflow for sports to be: shoot raw, open contact sheet (card reader), edit 1-4 images with ACR at a time, bring back to PM, caption and upload files no larger that 1.2MB. Repeat process until I have to go back out and shoot.
What I have been doing is ingest locked images from the card, import using lightroom, edit and export batch of edited photos using lightroom's built in limit file size option on export, open PM contact sheet, caption and transmit.