Strange Persistence records

I'm not using CMP. As I said, I'm using the 9.4.7 software version. Here is the information you asked me.

VIRTUAL ADDRESS 1.x.x.85   UNIT 1  
 |     ARP enable  
 |     (cur, max, limit, tot) = (77, 145, 0, 489122)  
 |     (pkts,bits) in = (8.489M, 26.00G), out = (9.455M, 71.91G)  
 +-> VIRTUAL virtual_443   SERVICE https  
 |     PVA acceleration none  
 |     (cur, max, limit, tot) = (74, 124, 0, 140736)  
 |     (pkts,bits) in = (6.218M, 23.99G), out = (7.247M, 55.81G)  
 |     requests (total) = 2.040M  
 +-> RULE iRule  
 +-> HTTP_REQUEST   1136756 total   1 fail   0 abort  
 +-> LB_SELECTED   756626 total   0 fail   0 abort  
 +-> POOL pool_80  LB METHOD observed   MIN/CUR ACTIVE MEMBERS 0/4  
 |     (cur, max, limit, tot) = (0, 23, 0, 23062)  
 |     (pkts,bits) in = (147439, 139.3M), out = (111301, 517.2M)  
 +-> POOL MEMBER pool_80/1.x.x.51:http   active,up  
 |   |     session enabled    priority 1    ratio 1  
 |   |     (cur, max, limit, tot) = (0, 6, 0, 5658)  
 |   |     (pkts,bits) in = (39522, 36.22M), out = (28880, 95.32M)  
 |   |     requests (total) = 5659  
 +-> POOL MEMBER pool_80/1.x.x.78:http   active,up  
 |   |     session enabled    priority 1    ratio 1  
 |   |     (cur, max, limit, tot) = (0, 7, 0, 7517)  
 |   |     (pkts,bits) in = (52298, 47.80M), out = (37482, 126.2M)  
 |   |     requests (total) = 7519  
 +-> POOL MEMBER pool_80/1.x.x.84:http   active,up  
 |   |     session enabled    priority 1    ratio 1  
 |   |     (cur, max, limit, tot) = (0, 5, 0, 6826)  
 |   |     (pkts,bits) in = (38090, 38.89M), out = (30909, 205.3M)  
 |   |     requests (total) = 6902  
 +-> POOL MEMBER pool_80/1.x.x.84:http   active,up  
 |     session enabled    priority 1    ratio 1  
 |     (cur, max, limit, tot) = (0, 5, 0, 3061)  
 |     (pkts,bits) in = (17529, 16.42M), out = (14030, 90.26M)  
 |     requests (total) = 3085

pool pool_80 {  
 lb method observed  
 monitor all HTTP  
 partition someone  
 members  
 1.x.x.51:http  
 1.x.x.78:http  
 1.x.x.84:http  
 1.x.x.84:http  
 }

The persistence profile configuration is the default one for a source address persistence.