Thanks. I received a private reply from someone else saying:
"Just a reminder that the one per year rollover rule does not apply to rollovers from IRAs to 401(k)s.."
Also, it's worth noting that the IRA one rollover per year rule applies only to rollovers, i.e., not to trustee-to-trustee transfers. Quote from IRS website, and link, follow. The link is a very useful summary of IRS guidance on this issue.
"You can, however, continue to make as many trustee-to-trustee transfers between IRAs as you want. You can also make as many rollovers from traditional IRAs to Roth IRAs ("conversions") as you want."
http://www.irs.gov/Retirement-Plans/IRA-One-Rollover-Per-Year-Rule
If anyone else sees a problem with doing annual transfers from a SEP IRA to a 401(k), please reply. I see no problem with it at this point.