No! Do not do anything. This is normal. Do not do anything. The status changes a million times to different stati...ignore this. This is normal. USCIS servers do this all the time. Sometimes, you can search for your case, and not find it, come back a few days later, you find it. Sometimes, the case status flips back and forth. This has nothing to do with you. These changes usually take place when they update the case. But then again, these are normal changes, they have nothing to do with you. So, don't stress or worry. Use the case status system as reference only, it is not the correct source of truthful information about your case. The best source for information, the correct information is the USCIS local office, or level 2 officer on USCIS phone system. Everything else sometimes give wrong information. Good luck.